What “recent research?”
This does not agree with my own experience. I read e-books all the time. They are more convenient than regular books in so many ways. But I have never noticed a difference in comprehension, or “absorption,” between the two. They are different, but I get the same out of both and later cannot remember whether I read that book as an e-book or as a paper book.
It’s a different story with audiobooks. Distractions apply there, and I do comprehend less with audiobooks. But books?
So, David, spill. What research?